Quantcast DVD-RB / DVD-RB Opt or Manual Encode? - digitalFAQ.com Forums [Archives]
  #1  
10-19-2004, 04:40 PM
break break is offline
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I have encoded (for backup) the same DVD (only the movie to test) using our great "KVCD notch matrix" with two methods:
1) DVB-RB (0.60) + RBOPT(0.15)
2) manual encode
for the same movie lenght, with the same audio, I have noted that the "Q" is not the same, but with manual encode is smaller (in my test, Q25 with DVD-RB and Q19 with manual method).
Is this normal?

Tony.
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  #2  
10-20-2004, 03:00 AM
Boulder Boulder is offline
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The same AVS script?

Is the final filesize the same?
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  #3  
10-20-2004, 05:28 AM
break break is offline
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Quote:
Originally Posted by Boulder
The same AVS script?
Yes, simple AVS to load .d2v file without any filter...

Quote:
Originally Posted by Boulder
Is the final filesize the same?
To find file size I have used KVCDcalc (thanks, Kwag and VMesquita ), added the same audio file size and duration of all content of DVD...

Tony
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  #4  
10-20-2004, 05:33 AM
Boulder Boulder is offline
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DVD-RB keeps the menus which may consume a large amount of space. There's the difference.
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  #5  
10-20-2004, 11:20 AM
break break is offline
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Quote:
Originally Posted by Boulder
DVD-RB keeps the menus which may consume a large amount of space. There's the difference.
Yes, but in KVCDcalc I have added to the "mux overhead" the total size of the vob file containing all the menu (in my case VTS_01_0.VOB), so the final Q should be approx. the same.
Can be the problem the vob-cell encoding of DVD-RB?
I'll test with other back-up.

Thanks Boulder.

Tony
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  #6  
10-20-2004, 11:29 AM
Dialhot Dialhot is offline
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Quote:
Originally Posted by break
Yes, but in KVCDcalc I have added to the "mux overhead" the total size of the vob file containing all the menu (in my case VTS_01_0.VOB), so the final Q should be approx. the same.
The best thing to do is to report into the mediasize field, the "space available for movie" (or something like this) that DVD-RB reports at the end of the preparing pahse.

Quote:
Can be the problem the vob-cell encoding of DVD-RB?
I don't think so. Do'nt you keep more audio in DVD-RB than you had in your manual calc ?
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  #7  
10-20-2004, 12:35 PM
kev23m kev23m is offline
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I have had a similar experience.

I tested it with one dvd , saved just the movie and prepared and ran prediction with Rb-Opt.

The difference in scripts was i was using kernel bob to deinterlace and bring fpd to 24 manually.

Q value was significantly lower manually.
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  #8  
10-20-2004, 02:44 PM
break break is offline
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Quote:
Quote:
Can be the problem the vob-cell encoding of DVD-RB?
I don't think so. Do'nt you keep more audio in DVD-RB than you had in your manual calc ?
I keep the same audio in manual encode (two differents DD5.1 language and one DD2.0): in KVCDcalc I add the total size (I have demuxed them for testing) of these audio tracks...


Tony
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